Ophthalmic mounting



' H. K. PARSONS.

OPHTHALMIC MOUNTING. v APPLICATION FILED JUNE 15. 1920.

Patent ed Sept.

INVENTOR l-ZKPARS 0N5 ATTORNEYS Patented sea. 5,1922.

@NHTED stares PATENT critics.

HAROLD K. PARSONS, OF SOUTHBRIDGE, MASSACHUSETTS.

OPHTHALMIC Mountains.

To all whom it may concern,

Be it known that I, HAROLD K. PARSONS, a citizen of thejUnited States,residing at Southbridge, in the county of Worcester and State ott'lvlassachusetts, have invented certain new and useful Improvements inOphthalmic Mountings, of which the following is a Specification. I Thisinvention relates to improvements in ophthalmic mountings and hasparticular reference to that type of mounting intended to be retained onthe face through spring actuated guard levers.

One of the principal objects of the present invention is to provide anovel and improved type of bearing and manner of attaching the actuatinglevers to insure ready assembling of the parts, reduction of wear to aminimum, and thus proper holding and alinement of the several parts ofthe mounting and of the mounting itself on the face when in use. I r iOther objects and advantages of my improved constructionshould bereadily apparent by reference to the following specification taken'inconnection with the accompanying drawings, and it will be understoodthat I may make any modifications in the specific details ofconstruction shown and described within the scope of the appended claimswithout departing from or exceeding the spirit of my invention. I

Figure I represents a front view of a mounting embodyingmy improvements.

Figure II represents a fragmentary sectional View of one form thereof.

Figure III represents a similar view of another form.

Figure IV represents a similar view of an enclosed type.

In the drawings, the numeral 1 designates the bridge or lens connectingmember provided at each end with the clips 2 adapted to receive andretain in position the lenses 8. One of the great advantages of the typeof mounting here illustrated resides in the fact that the lenses areconnected by a rigid bridge 1' and hence under ordinary condi tions willbe positively maintained in correct relationship one to the other. Oneof the difficulties experienced with this type of mounting in the pasthas been due to the fact that the bearings have been insufiiclent, withthe result that the levers have tended 1920. Serial No. 389,073.

to loosen and wabble and thus the mounting as an entirety has not beenproperly retained on the face. I

A further difficulty has been hitherto experienced in connection withthese mountings due to the fact that the parts have been so related asto be difiicult of assembling in the original manufacture or difficultof replacement should any become worn or broken. I It is, therefore, thepurpose of my invention to provide a mounting so far as possiblemodifying the defects of prior art constructions. I In carryingout thisprinciple in the form of my invention 'illustratedin Figure II, I haveformed at each end of the bridge 1 the flattened portions 4 having thecentral apertures 5 formed therethrough surrounded by the upstandingflange or wall 6 preferably in the form of a tube. Disposed beneath theportion 4 of the bridge and serving as a support therefor is the guardlever 7l1aving the actuating handle 8 and nose engaging portion'9,thef'said lever thus serving as a support for the bridge with a widefiat portion bearing thereagainst to insure maximum contact surface,tending to eliminate possible wabbling ofthe parts, it being'understoodthat the guards are clamped against the nose as through the action ofthe springs 10 and serve as substantially stationary parts retaining theremainder of the mounting in position.

To pivotally. connect the guard member 7 with the mounting I preferablyform it with 'an upstanding pivot portion 11 which fits within theaperture 5 and inside the tubular sleeve 6 which provides a longvertical bearing for the pivot on the lever 00- operating with thebearing of the under side of the bridge against the top of theleinwardly actuate the same. While the weight and bearing of the partswhen in use will retain the bridge and guard lever in position to lockthe same against separation, I make use of a cap member such as thescrew head 12 having the screw 13 engaging the upper portion of thepivot member 11 looking it in position. It is to be noted that this capmember is of sufiicient size to ix.- addition overlie the spring 10 andretain it in place on the tube 6. It will thus be seen that I haveprovided an extremely satisfactory and easily assembled construction, inthat the lever may be slipped into place from the under side of thebridge with its rigid pivot extending up through the bridge, while thespring may be separately applied or removed over the member 6 and thesingle cap member serves to satisfactorily lock both parts together, c

Figure III illustrates a slight variation in the construction, in whichin place of making the pivot member 11 as a solid tapped out stud, suchas indicated in Figure II, the member 11 is in the form of a tube havingthe upper portion smooth and the lower portion threaded to engage thelower threaded 'end of the screw 13 so that the screw may be droppedinto the upper por-' tion of the tube and then tightened in the lowerportion to securely lock the parts together, the height of the pivot 11being preferably slightly greater than the combined thickness of thebridge and member 6 so that the screw may be securely tightenedwithoutbinding against any portion of the lens supports. 7

Figure IV illustrates a slight modification of the construction in whichin place of the second tube 6 being employed integral with the bridge,the actuating spring lOis slipped directly over the upwardly projectingportion of the pivot member 11, while a cup sleeve or tube is encirclesthe spring 10 and has an end portion 15 interlocking with the upper endof the pivot 11, a tongue 16 on the pivot holding the cap for rotationtherewith while the screw 13 serves to connect the parts. In this formit will be seen that the cap member overhangs and comes down against thebridge 1 and provides a bearing preventing longitudinal play of thepivot member 11 through the bridge and helps when needed to form asupplemental hearing to steady the lever and prevent any wabbly movementthereof during its pivotance even as it and the bridge may wear.

I claim:

1. In a device of the character described, the combination with a bridgemember having a pivot receiving aperture therethrough, of a guard leverhaving an upstanding pivot portion extending through the aperture in thebridge portion, an actuating spring for the lever resting on the bridgeand surrounding the pivot projection of the lever and a cap membercarried by the pivot projection of the lever overlying the spring andslidably engaging a portion of the bridge for retaining the severalparts in position.

2. In a device of the character described, the combination with a bridgemember having a pivot receiving aperture the'rethrough, of guard leverhaving an upstanding tubular pivot portion extending through theaperture in the bridge portion, an actuating spring for the leverresting on the bridge and surrounding the pivot projection of the lever,a cap member carried by the pivot projection of the lever overlying thespring and slidably engaging a portion of the bridge for retaining theseveral parts in position, and means securing the cap againstindependent rotation with respect to the lever.

In testimony whereof I have aflixed my signature, in presence of twowitnesses.

HAROLD K. PARSONS.

Witnesses:

Anion G. HASKELL, ESTHER LorLER.

